simplify style settings, improve naming (#44)

* simplify style settings by passing `style` directly to Widgets. No need to store it in `state` of widgets.
* remove unneeded things
* naming (state vs. widgets)

src/widgets/clock.rs

@@ -73,26 +73,24 @@ pub enum Format {
 }
 
 #[derive(Debug, Clone)]
-pub struct Clock<T> {
+pub struct ClockState<T> {
     initial_value: DurationEx,
     current_value: DurationEx,
     tick_value: DurationEx,
     mode: Mode,
     format: Format,
-    pub style: Style,
     pub with_decis: bool,
     phantom: PhantomData<T>,
 }
 
-pub struct ClockArgs {
+pub struct ClockStateArgs {
     pub initial_value: Duration,
     pub current_value: Duration,
     pub tick_value: Duration,
-    pub style: Style,
     pub with_decis: bool,
 }
 
-impl<T> Clock<T> {
+impl<T> ClockState<T> {
     pub fn toggle_pause(&mut self) {
         self.mode = if self.mode == Mode::Tick {
             Mode::Pause
@@ -296,10 +294,6 @@ impl<T> Clock<T> {
         self.update_format();
     }
 
-    pub fn is_done(&self) -> bool {
-        self.mode == Mode::Done
-    }
-
     fn update_format(&mut self) {
         self.format = self.get_format();
     }
@@ -324,13 +318,12 @@ impl<T> Clock<T> {
 #[derive(Debug, Clone)]
 pub struct Countdown {}
 
-impl Clock<Countdown> {
-    pub fn new(args: ClockArgs) -> Self {
-        let ClockArgs {
+impl ClockState<Countdown> {
+    pub fn new(args: ClockStateArgs) -> Self {
+        let ClockStateArgs {
             initial_value,
             current_value,
             tick_value,
-            style,
             with_decis,
         } = args;
         let mut instance = Self {
@@ -345,7 +338,6 @@ impl Clock<Countdown> {
                 Mode::Pause
             },
             format: Format::S,
-            style,
             with_decis,
             phantom: PhantomData,
         };
@@ -394,13 +386,12 @@ impl Clock<Countdown> {
 #[derive(Debug, Clone)]
 pub struct Timer {}
 
-impl Clock<Timer> {
-    pub fn new(args: ClockArgs) -> Self {
-        let ClockArgs {
+impl ClockState<Timer> {
+    pub fn new(args: ClockStateArgs) -> Self {
+        let ClockStateArgs {
             initial_value,
             current_value,
             tick_value,
-            style,
             with_decis,
         } = args;
         let mut instance = Self {
@@ -416,7 +407,6 @@ impl Clock<Timer> {
             },
             format: Format::S,
             phantom: PhantomData,
-            style,
             with_decis,
         };
         // update format once
@@ -461,6 +451,7 @@ pub struct ClockWidget<T>
 where
     T: std::fmt::Debug,
 {
+    style: Style,
     phantom: PhantomData<T>,
 }
 
@@ -468,8 +459,9 @@ impl<T> ClockWidget<T>
 where
     T: std::fmt::Debug,
 {
-    pub fn new() -> Self {
+    pub fn new(style: Style) -> Self {
         Self {
+            style,
             phantom: PhantomData,
         }
     }
@@ -568,12 +560,12 @@ impl<T> StatefulWidget for ClockWidget<T>
 where
     T: std::fmt::Debug,
 {
-    type State = Clock<T>;
+    type State = ClockState<T>;
 
     fn render(self, area: Rect, buf: &mut Buffer, state: &mut Self::State) {
         let with_decis = state.with_decis;
         let format = state.format;
-        let symbol = state.style.get_digit_symbol();
+        let symbol = self.style.get_digit_symbol();
         let widths = self.get_horizontal_lengths(&format, with_decis);
         let area = center_horizontal(
             area,